- (a) When it is desired to consummate a binding contract between the parties before the contractor undertakes performance, the contracting officer shall require written (see 2.101) acceptance of the purchase order by the contractor.
- (b) Each purchase order modification shall identify the order it modifies and shall contain an appropriate modification number.
(c) A contractor's written acceptance of a purchase order modification may be required only if—
- (1) Determined by the contracting officer to be necessary to ensure the contractor's compliance with the purchase order as revised; or
- (2) Required by agency regulations.